Archived posting to the Leica Users Group, 2011/04/11

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Subject: [Leica] DOF of 80/1.4 at 1.4 slimmer than 50mm at 1.4?
From: vick.ko at sympatico.ca (Vick Ko)
Date: Mon, 11 Apr 2011 07:41:08 -0400
References: <747098.9554.qm@web82101.mail.mud.yahoo.com> <BD38DC430E434F79B63832050B44DA53@jimnichols> <BANLkTinCi_aYvnyQwfM+g=DF=yB+4gFX4Q@mail.gmail.com>
 
Hello

I've been playing with my DMR with the 80mm f1.4.

I'm finding it a lot more difficult to use and capture proper focus at 
f1.4 than I expected.

Is the dof of an 80mm at f1.4 thinner than the dof of a 50mm at f1.4?

And is this typical of what people found, using their rf 75mm Summiluxes 
- very difficult to capture proper focus?

I suppose it didn't help, trying to photograph a 7 month old boy, who 
doesn't quite understand sitting still yet   :-)

Vick
Replies: Reply from afirkin at afirkin.com (afirkin at afirkin.com) ([Leica] DOF of 80/1.4 at 1.4 slimmer than 50mm at 1.4?)
Reply from Frank.Dernie at btinternet.com (Frank Dernie) ([Leica] DOF of 80/1.4 at 1.4 slimmer than 50mm at 1.4?)
Reply from mark at rabinergroup.com (Mark Rabiner) ([Leica] DOF of 80/1.4 at 1.4 slimmer than 50mm at 1.4?)
 In reply to: Message from rgacpa at yahoo.com (Bob Adler) ([Leica] IMG: Foothill Park)
Message from jhnichols at lighttube.net (Jim Nichols) ([Leica] IMG: Foothill Park)
Message from richard at imagecraft.com (Richard Man) ([Leica] IMG: Foothill Park)